Java

import java.awt.*;

import javax.swing.*;
import java.awt.event.*;
public class GraphicUse extends JPanel
{
public void PaintComponent(Graphics gr)
{	
	super.paintComponents(gr);
	this.setBackground(Color.BLUE);
	gr.setColor(Color.WHITE);
	gr.fillRect(50, 50, 100, 100);
	gr.setColor(new Color(139,38,190));
	gr.fillRect(50, 70, 100, 100);
	gr.setColor(Color.RED);
	gr.drawString("This is a new String", 50, 90);	
}
	
	public static void main(String[] args) 
	{
	}

}

JFrame newframe = new JFrame("Color Frame");
	         newframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);         
	         GraphicUse gu = new GraphicUse();	         
	         newframe.add(gu);
	         newframe.setSize(250,300);
	         newframe.setVisible(true);

ms.isDataReady = false;
...
while(!ms.isDataReady);

ms.isDataReady

ms